Video Merger

Runs FFmpeg inside your browser. Pressing the process button loads about 32 MB of engine files from unpkg, with jsDelivr as a fallback. The engine is reused while this page stays open; later visits may download it again depending on browser caching. These hosts receive ordinary connection information such as your IP address, not your selected file. Internet access is needed when resources are not cached. Large clips may take several minutes. All clips are scaled to the same height at 30 fps and joined end to end.

Runs FFmpeg inside your browser. Pressing the process button loads about 32 MB of engine files from unpkg, with jsDelivr as a fallback. The engine is reused while this page stays open; later visits may download it again depending on browser caching. These hosts receive ordinary connection information such as your IP address, not your selected file. Internet access is needed when resources are not cached. Large clips may take several minutes. All clips are scaled to the same height at 30 fps and joined end to end. Best for clips under about 200 MB. Very long or 4K videos may run out of browser memory, especially on phones. Clips with different shapes are scaled, not padded, so mixing portrait and landscape clips gives different widths and may fail — use clips of the same orientation.